Automatic weighing and recording scale



I. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE;

APPLICATION FILED JULY 14.1909.

Patented Sept. 14, 1920.

12 SHEETSSHEET l.

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I. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

Patented Sept. 14,1924

APPLICATION FILED JULY I4, I909. 1,352,880.

I2 SHEETS-SHEET 2.

F ELD Cmcurr START/Nq CIRCUIT ARMA TuRE CIRCUIT T C E m D mu W 0a C n dV 32 7 L n w J Wdnmu 1i CW/Wo 051M J. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

APPLICATION FILED JULY 14. I909.

1,352,880. Patented Sept; 14, 1920.

l2 SHEU$- 55521.1.

REVERSE ARMA'ruRs CIRCUIT rx- H11 1/ fi F 1! s I I U6 3 6 C I C 1 \\,V-a A a i I F2 Z V SHAFT u/vzoc/mv AND SHAFT Loc/mvq r 1 Onto/rs COMB/N50P Q R Y G nna/m4 J. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

APPLICATION FILED JULY 14,1909.

1,352,880. PatentedSept. 14,1920.

12 SHEETSSHEET 5.

Elnucufoa I 00km 3 1. v. DAVIS. AUTOMATIC WEIGHING AND RECORDING SCALE.

' APPLICATION FILED .IULY I4, I909. 1,352,880. PatentedSept. 14, 1920.

I2 sHEETS-SHEET 5.

SNRMW N M H211 cases M W m M J. V. DAVIS. AUTOMATIC WEIGHING ANDRECORDING SCALE.

I APPLICATION FILED IULY 14,1909. 1,352,880.

12 SHEETS-SHEET I.

Patented Sept. 14, 1920.

Jhn V'Dauz's.

atto'pmua wine/aw J. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

APPLICATION FILED JULY 14,1909- 1,352,880. Patentedsept. 14, 1920.

2 SHEETS-SHEET a.

I I I atkovmzq J. V. DAVIS. AUTOMATIC WEIGHING AND RECORDING SCALE.

7 APPLICATION FILED JULY 14,1909. 1,352,880. PatentedSept. 14, 1920.

I2 SHEETSSHEET 9.

I. v. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

APPLICATION FILED JULY I4,1909- Patented Sept. 14, 1920.

I2 SHEETSSHEET I0- X X VII ZfwrXXXI mm M 4H m M m M m M. 0 W W M2 J. V.DAVIS.

AUTOMAHC WElGHlNG AND RECORDING SCALE. APPLICATION FILED JULY 14,1909.

- PatentedSept. 14,1920.

l2 SHEETS-SHEET H.

Elmaantou J. V. DAVIS.

AUTOMATIC WEIGHING AND RECORDING SCALE.

APPLICATION FILED JULY 14,1909.

Qmi/bnmeo UNITED STATES PATENT OFFICE.

JOHN V. DAVIS, 0F KELSEYVILLE, CALIFORNIA, ASSIGNOR, BY MESNEASSIGNMENTS,

TO BOSTON SCALE AND MACHINE CO., TION OF MASSACHUSETTS.

OF BOSTON, MASSACHUSETTS, A CORPORA- AUTOMATIC WEIGHIN G AND RECORDINGSCALE.

Specification of Letters Patent. Patented Sept. 14 1920 Applicationfiled July 14, 1909. Serial N8. 507,638.

T 0 all whom it may concern Be it known that I, JOHN V. DAVIS, a citizenof the United States, residing at Kelseyville, in the county of Lake andState of California, have invented certain new and useful Improvementsin Automatic Weig'hing and Recording Scales, of which the following is'aspecification.

This invention relates to a new and useful improvement in automaticweighing and recording scales, more especially to scales known asplatform scales.

The object of the present invention is to produce a scale in which afteran object has been placed upon the platform and the scale started, theweighing and recording shall be done without the lntervention of theoperator, except to start the mechanism in operation; also to record theweight of the object weighed and to indicate the person who has done theweighing.

The invention consists essentially in a system or combination ofelectric circuits so arranged that when the mechanism is started all thevarious details relative to the weighing is done by the cir uits, bothin weighing, starting, and in cutting out the several circuits. Theinvention further consists in a record ing mechanism attached to theweighing mechanism in which the weight of the object to be weighed isrecorded and at the same time there is indicated the person who does thespecial weighing.

The invention further consists in a double source of electricity,preferably one battery of two cells, the inside negative pole of one ofthem connected to the inside positive pole of the other, with a branchwire taken off at a point between the two cells.-

The invention further consists in an electrio-motor, field windings ofwhich are connected to the outside negative pole of one cell and to theoutside positive pole of the other cell, thus obtaining the combinedvoltage of the two cells. A rotatable armature mounted within themagnetic field of the motor, one brush of which is connected to the wirewhich branches off between the two cells, the current of the other brushof which may travel through one of two paths to either the outsidenegative'pole of one of the cells or to the outside positive pole of theother cell and thus produce rotation of the armature in a directiondepending on which of these outside poles the armature w re leads to,obviously the armature runs with one-half the voltage of the combinedsources of electricity.

The invention further consists in an electric motor mounted on the beamof any ordinary scale and so connected electrically that of two returnpaths of the armature circuit the scale beam shall form a part of one ofthem.

The invention further consists in a scale beam so connected with themotor that when the beam touches an electric contact at the lowerextremity of its stroke it will act as an agent," working electricallythrough a system of relays to produce a change in the direction ofrotation of the armature of the motor, after a predetermined timeelapses, the scale beam being also arranged so that the subsequentbreaking of the electric contact at the end of the beam will cause thearmature to stop rotating instantly, by virtue of the fact that the.armature circuit only is broken and the magnetic field of the motor actsas a clamp to the armature.

The invention further consists in an electric motor mounted on scalebeam and so to cause the poise to travel outwardly for a predeterminedtime after the beam drops to the bottom, or if the beam is already atthe bottom, when the weighing is started, the motor will run in adirection to cause the poise to travel outwardly for a predeterminedtime after starting to run.

The invention further consists in a method of controlling the operativedevices of a weighing scale so that a distinction is automatically madebetween temporary or false balances due to vibration, and the normal ortrue balance.

The invention further consists in a method of controlling the operativedevices of an automatically operated weighing scale so that apredetermined time must elapse before said operative devices arepermanently disconnected or deenergized, following the coming to abalanced position of the scale beam.

The invention further consists in a system that a predetermined periodof time must elapse after the scale beam rises before the starting shaftis unlocked to allow of the weight being recorded.

The invention further consists in a magnetic circuit breaking device, soconnected with a system of relays and a starting shaft, that variouscircuits maybe broken by it and by virtue of-the momentum of its mov-.-

ing parts its-own operating circuit may be broken also. The inventionfurther consists in details of construction both in the electrical andmechanical portions of the scale.

Previous to this invention in all the various classes of scales in whichelectric circuitsv are used the construction has been such -that theoperator could at any timetamper with or' manipulate the mechanism so asto be guilty of fraudulent weighing. In the present device, the designis to preclude all opportunityfor fraudulent weighing as the mechanismis complete in itself and is'arranged so that it may not be tamperedwith nor manipulated by the operator.

In the annexed drawings:

Sheet 1.

Figure is a diagrammatic view of the several electric circults employedin this invention, there being seven in all.

Sheet 11.

Fig. II is a diagrammatic view of the field circuit. i

- Fig. III is a diagrammatic view of the Sheet IV.

view. of the Figs. VIII, IX, and X are vertical transverse sections ofthe relay cups.

Fig. XI is a perspective detailed view of the switch and key foroperating the same.

Sheet .V.

Fig. XII is a perspective view of the weight beam poise and motor,showing the outside thereof and interior perspective view of therecording mechanism.

Sheet VI Fig. XIII is a vertical longitudinal sec- .tion through Fig.XII.

of the Fig. XIV is an end view of Fig} XIII.

Fig. XV is a partially transverse vertical.

1gecfiion of XIII, taken at the gravity Sheet VII.

f Fig. XVI is a perspective view of the exterior of the motor and thewiring thereto. Fig. XVII is a detail section of the 'cir-' cuit,connections.

Fig. XVIII'is a perspective view of th shaft andconnectio'ns.

Fig. XIX is a longitudinal section through the poise. Fig. XX is atransversesection through thepoise.

- Sheet VI I I Fig. XXI is an enlarged perspective view of the interiorof therecording mechanism,

.motor end of the scale beam showing the taken from the opposite end ofthe view shown in Fig. XII.

Fig. XXII is an enlarged detail showing one side of the clampingmechanism at the end of the beam away from the motor.

Fig. XXIII is a view of the other side of the clamping mechanism.

Skeet IX.

Fig. XXIV is a view of the rear of the recording mechanism case, theinterior, portions bein shown in dotted lines.

-Figs. X V and XXVI are an end view and longitudinal section of thepaper-supply reel.

- Sfieet X.

Figs. XXVII and XXVIII are an end view and longitudinal section of thecombined ink-ribbon feeder and paper-feeding roll operator.

Fig. XXIX is anend view of the frame carryin the paper-feeding rolls.

Fig. X,X is a longitudinal view of the same.

Fig. XXXI is a locking pin for the paper-feeding frame.

Skeet XI. Fig. XXXII is a longitudinal section through the main fulcrumof the printing levers.

Fig. XXXIII is a longitudinal section through tlfe fulcrum of theprinting pad.

Fig. XXXIV is'an end view of the printing pad mechanism. I

Fig. XXXV-is a top view of the bottom part of the printing padmechanism, shown in Fig. XXXIV.

sa a XII. I

' Fig. XXXVI. is an end view of the take-' up roll for the paper.

F ig; XXXVII is a longitudinal section end view and longitudinal sectionof the ink-ribbon tightener.

Fig. XL is a longitudinal section of one of the guide rollers for inkingribbons.

General description of the electrical mechanism.

In the drawings, reference will first be made to Sheets I, II, III, andIV. In these sheets of drawings the letter A represents any source ofelectrical energy, in the present instance preferably a batteryconsisting of two cells a and a having the usual positive plates 0 andnegative plates 0'. A wire B connects the positive plate 0 of the cell awith the negative plate 0 of the cell a. Leading from the negative plate0 of the cell a is a Wire C connecting with the field I) of the motor M.Leading from the field D of the motor M is a wire E connected to a brushe, of a pair of brushes e, e. From the brush 6 there runs a wire Fwhich, by

a branch wire F, is connected with the positive plate 0 of the cell a'..In juxtaposition with the pair of brushes e and e is a shaft G havingsecured thereto at the brushes e and e a commutator H of insulatingmaterial and having a metallic. bar it, upon which the commutator H andthe brushes e and e bear. Spaced apart on this shaft G, away from thecommutator H and away from each other, are two other commutators and Lof insulating material, one provided with a metallic strip I0, and theother with a metallic strip Z. The shaft G is also provided with aratchet wheel N having teeth n, and also with an operative handle N,both rigidly secured to such shaft.

Connected to and leading from the wire B is another wire 0, whichbranches at the point 0. One branch 0 is connected with one side of aswitch 0 consisting of the rigid'part 0 and the flexible part 0 (Fig.XI). Leading from the other side of the switch 0 is another wire 0?connected with the armature M of the motor M. From the armature of-themotor M another wire leadsto the binding-post p of the relay cup P (Fig.VIII). lVithin the relay cup P at its top, adjacent to the binding-postp, there is located the spring-contact 12 From this spring-contact pthere leads a wire p which connects with the top solenoid g of thesecond relay cup Q. From this solenoid q of the relay cup Q there leadsanother wire 1' which connects with the solenoid r in the third relaycup R. From the solenoid r of the relay cup B there leads another wire1" which connects with a spring-contact g in the top of the relay cup Q.Adjacent to the spring-contact g is a contact-point (7 which isconnected to a binding-post g.

From the binding-post g a Wire g is connected with the negative plate 0'of thecell a of the battery A. See Figs. I and IX.

At a convenient location is placed a frame S upon which, in suitablestandards 8, is located a rotatable shaft 5, at one end of which isplaced a commutator s of insulating material provided with a metallicstrip 85' At the other end of the shaft 8 are located and spaced aparttwo commutator-s s and s of insulating material provided with metallicstrips 8 and 8. .At its middle, the shaft .9 is provided with a circularpinion s Engaging this pinion s is a rack 8 located on a soft ironplunger 8 the ends of which are received into the solenoids s and ssecured to the frame S.

Leading from the wire F connected with the battery A is another wire Fwhich is connected with a binding-post F of the relay cup R. From thisbinding-post F a wire f leads to a brush f of a pair of brushes f and fbearing against the commutator s on the shaft 8. Leading from the brushf is a wire f which leads to a brush 7 of a pair of brushes 4 and fbearing a ainst the commu tator L on the shaft From the brush f thereruns a wire f which is connected to the solenoid 17 within the relay cupR. From the solenoid 1 there passes a wire r which is connected with asecond solenoid 9 within the relay cup Q. From this solenoid 9 runs awire g to the binding-post From the point 0 where the wires 0 and 0'unite, there starts a wire T which is connected with the' solenoid s andpassing therefrom is connected to a brush 6 of a pair of brushes t and tbearing against the commutator s on the shafts s. From the brush t thereruns a wire T which is.connected at t with the wire 7 leading from thesolenoid r of the relay cup R to the spring-contact g of the relay cupQ.

Leading from the armature M of the motor M there is a wire u connectedto the inner end of the beam. At its outer end. the beam is providedwith a contact point 11 and adjacent thereto is another eonta -tpoint uLeading from the contact 11* there is a wire U which is connected to asolenoid p located within the relay cup 1. Leading from the solenoid 19there is another wire U which is connected at a with the wire leadingfrom the solenoid q of the relay cup Q to the solenoid-1' of the relaycup R. To a binding-post g which is adjacent to the spring-contact f ofthe relay cup Q there is secured at one end a wire u which is secured atits other end ,to a binding-post 1" adjacent to the spring-contact f ofthe relay cup R connected with the binding screw F Adjacent to thespring-contact f is an other binding-post V from which there runs a wirev, the other end of which is connected y and z.

plates w, y and 2' having the central holes with a brush '0' of a pairof brushes 0 and '0 bearing upon the commutator s of the shaft 8'.Leading from the brush v is a Wire v having an electric lamp 4: andconnected at its other end to the electro-magnet '0 This electro-magnethas an armature '0 provided with a pawl 0 adapted to engage the teeth aof the ratchet N fastened Relay cups. The relay cups which have beenadverted to already and which are usedin the vari-- ous circuits, areconstructed as follows. Each cup is made ofmetal, preferably soft iron.The cups have in their bottoms the mercury cisterns X, Y and Z, themercury being indicated by the' horizontal dotted lines therein. Abovethese cisterns are chambers X, Y and Z. These chambers are larger thanthe cisterns and have at their bottoms the rabbets or shoulders m,Placed on these shoulders are 00 3 and .2 Above these plates are placedin the chambers solenoids. In the relay cup P there is but one solenoidp. In the relay cup Q there are two solenoids g and one above the other.In the relay cup there are two solenoids r and r one above the other.Above these solenoids are other metal plates a y and a Passing downthrough the center of these solenoids are the soft cores 412 11 and .2At their tops, these soft metal cores m, g and a are securely fastenedto the metal plates m 1 and 2 the upper ends 00 y and 2 of these softmetal cores protruding beyond the metal plates m y" and 2 and arecomposed of insulatingmaterial. The lower ends 01;, y and e of thesesoft metal cores pass loosely through the holes in "the plates :w, y ande and have secured thereon hard rubber cups w, y and 2, each providedrespectively with a passage a 1 and 2 passmg down through their bottomsleading from their interior cavities to the outside.

.. These passages vary in size. The sizes are such that as the cup isimmersed in the mercury and is then floated and the mercury passes fromthe interiorof the" cups down through the passages, this action of thecups will vary in time, as will be more fully described hereinafter anddescribed in the operation of the device.

Mechanical construction of the scale.

v Sheets V, VI, and VII. The numeral 1 represents a bifurcated standardhaving the forks 2 and 3. On their tops the forks 2 and 3 are providedwith dovetail recesses 4 in which are secured trunnion blocks 5 havingon their tops V-shaped recesses 6. Extending outwardly from the top ofthe fork 2, close to the recess 4, there is a bracket 7 provided with avertical slot 8.

In this vertical slot 8 there is a block of insulatingmaterial 9. Placedin this block of insulating material 9 are four cups 10, the solidbottoms of which project down through the block 9 and extend below thebracket 7, and the lower ends are made in the form of binding-posts 11,11. To the former 11 are secured the wires C and E of the field circuit;and to the latter 11'; the wires 0 and p of the two armature circuits.In these cups 1O mercury is to be placed. Resting in the Vsshapedrecesses 6 of the trunnion blocks 5. are-the knife edges 12 of theV-shaped trunnions 13 of a bar 14 which passes through the scale beam15. Inserted into the mercury of these cups 10 are the pins 10, thebot-.

toms of these pins and the knife edges 12 being in the same horizontalline. Fig. XVII. p

A scale beam 15 has on its inner or'motor end 16 a seat 17 for the motorM. Back of the pivot 18 of the beam from which the beam hook 19 runs, abeam rod 20 is placed between the motor M and the trunnions 13,

and connects with the usual platform mechanism. Projecting from theupper surface of the scale beam 15 and in one piece therewith is abracket 21, and to one side a bracket 22 alined with the bracket 7of thestandard 1. The bracket 22 has the block of insulating material 9 inwhich are held the pins 10 which are inserted in the mercury of cups 10.The bracket 21'has through it a bore 23 provided on the side away fromithe motor with an enlarged counter-bore 24, and at its top a hole 25.Placed in the counter-bore 24 is the circular ball race 26 having initsbottom the circular perforation 27 centered with the bore 23 of thebracket 21. At its outer end, the beam 15 is provided with anotherbracket 28rising therefrom and integral therewith having a cap 29, thecap and bracket having between them a bore 30 in which is placed a ballrace 31 similar in construction to the ball race 26. Within the ballraces 26 and 31 are placed the balls 32 and 33. Passing through the ballraces 26 and 31, and amidst the balls 32 and 33 are the ends 34 and 35of the beam screw36. This beam screw has the conical portions 37 and 38where the balls 32 and 33 bear against it. The end of the beam screwwhich passes through the ball race 26 is elongated and extends outthrough the bore 23 of the bracket 21 and beyond the bracket. Theextremity of the end 34 of the beam screw is held by a suitable coupling38' to the protruding end 39 of the armature shaft 40 of the motor M sothat the armature shaft and the beam screw are practically onestructure. Around the beam screw 36 is located the poise 41. This poise41 consists of a boX made in duplicate halves 42 and 43 held to ether bythe transverse bolt 44. Figs. XIII, and XX. The beam screw 36 passesthrough the openings 45 and 46 of this poise, and the lower art of thepoise straddles the beam 15. ithin the poise and above the beam screw 36there are located side by side two smaller shafts 47 and 48. The ends 49of these shafts 47 and 48 are held in the ball races 50 secured at oneend of the poise 41. The other ends 51 of the shafts 47 and 48 are madein the shape of ball races and a screw 52 passes through that end of thepoise 41 and has a tapered end 53 which bears against the balls in theball race ends of the shafts 47 and 48. Each shaft 47 and '48 hasthereon two circumferentially grooved rollers 54 and 55. Of these threerollers the roller 55 runs loose on the shaft, but the roller 54 is madetight upon the shaft 47 so that the shaft and roller will turn together.At each end of each half 42 and 43 of this poise 41, on the inside,there is made a slight kerf 56. Alined with these kerfs are the threadedopenings 57 in which are placed the screws 58. At the outer end thescale beam is provided with a projection 59 which extends out through anopening 60 in a standard 61 of the scale beam. Sheets VI and VIII, Figs.XIII, XXII and XXIII. On the outside the standard 61 has two clampingjaws 62and 63 hinged thereto, one jaw being above and the othenj awbeing below the protruding end 59 of the scale beam 15. On theprojecting ends 64 and 65 of these clamping jaws 62 and 63 are securedlever arms 66 and 67 having toothed segments 68 and 69 engaging eachother. One of these lever arms, as 67, is connected by a rod 70 with abell-crank lever 71 connected by a rod 72 with the shaft G. Sheet VII,Fig. XVIII. The beam 15 has on its under side, near its outer end, abalance ball 73 and the pivot 74 on which a counter-weight may be hungif desired. Immediately under the trunnions 13 the scale beam 15 hasattached wheel 76 on the beam screw 36. This counter 77 may be arrangedwith two sets of figures, the adjustment being such as when a set offigures is in line for printing a duplicate set will be in sight, sothat the operator can read just what is being printed by the machine.

Just above the counter is placed the recording mechanism. Sheets V,VIII, IX. This is supported by an elongated frame 79 having the two legs80 and 81, the bottom offsets 82 and 83 of which are secured to otheroffsets 84 (Sheet VII, Fig. XVI) and 85 made with the forks 2 and 3 ofthe standard 1. Secured to the inner face of the elongated frame 79 aretwo guide brackets 86. Placed on the tops of these guide brackets 86 isa slide bar 87 having at its front end 88 a rack 89 on the under side,and on-its top in the middle a number of letters or symbols 90. At itsrear end 91 this bar has secured to it one end of a spring 92, the otherend of which is secured to, the frame 7 9. The brackets 86 are so placedon the frame '79 in relation to the counter 77 that the letters orsymbols on the 88 will be on a line with the tops of the counter wheelsso that when an impression is taken of the figures on the counter wheelsat the same time an impression will be taken of a letter or symbol onthe bar 88. Held by a pivot 93 to the frame 79 below the rack end of thebar 90 is a segmental lever 94 having at its top a curved toothedsurface 95 adapted to engage the rack 89 of the bar 90 and having at itslower end 95 the flattened part 96. In Sheet IV, Fig. XI, wherein isshown the switch 0 which is in the armature circuit, Sheet I, there isshown a device for contacting the two parts 0 and 0* of this switch. Asshown in Fig. XI, this is for convenience an ordinary barrel lock key.The key 97 passes through the lock and engages the lever arm or bolt 98on the inside of the barrel. On turning the key 97 and the bolt 98 theend 99 is forced against the spring 0 i and presses it against astationary portion 0 of the switch 0 which closes the switch. At thesame time the point 100 of the key 97 bears against the flattened end 96of the segmental lever 94 turning the lever 94, and 1 operating upon therack bar 90. moves this bar outward against thetension of the spring 92.Sheet VIII, Fig. XXI. Different lengths of keys will bring differentletters or symbols on the top of the bar 90 in line with the figures atthe top of the counter Wheel.

To the inner face of the back 101 of the frame 79 there is secured theroll support 102. Sheets VIII, IX. Figs. XXI, XXV, XXVI. Thispaper-supply roll support 102 consists of a stud 103 by which thepaper-supply roll support is secured to the back 101 of the frame 79.This paper-supply stud 103 has a groove 104 in its surface in 105;Around the stud 103 at the ends are placed circular plates or washers106 and fitting to the eccentric 138 of the shaft 137 107, the plate 106being loose on the inner end of the stud 103, while the plate orwasher107 fits snugly against a rabbet 108 at the extreme outer end ofthe stud 103,

v and the said plate or washer 107 is held tightly in place in therabbet 108 by the thumb screw 109, which is threaded and takes into theouter end of the stud 103. The

roll of paper to be used is placed on the stud To the inner face of theback 101 and beneath the paper-supply roll support 102 there is securedthe printing pad frame 110. Sheets VIII, XI. To the back 101 there issecured, by a threaded connection, an elongated, hollow bearing 111.Sleeved in the bore 112 of this hollow bearing 111 is a shaft 113, tothe inner; protruding end 114 of which there is keyed a lever 115. Tothe outer end 116 of the lever 115 there is loosely jointed the upperend 117 of a downwardly extending link 118. The lower end 119 of thisdownwardly extending link 118 is pivotally held by a pin 120 between twoears 121 secured to the middle ofedge 122 of the printing pad support123. In the underside of the edge 122 of the printing pad support 123there is made a dovetail groovein which is inserted the printing pad124. At the other edge the printing pad support is provided with twoperforated ears 125 spaced apart. Secured to the back 101 and extendingfrom the front face thereof and passing loosely through the perforationsof the ears 125 is a stud 126, the frame being secured on the stud 126by a pin 127. On this stud 126 between the perforated ears 125 there isloosely placed ahard rubber roller 128 having at its ends the flanges129. The shaft 113 also projects'behind theback 101 of the frame 7 9 andto its protruding end 130 there is keyed a lever 131 of a devicehereinafter 'to be explained. Sheet IX, Fig. XXIV.

Also secured to the inner face of the back 101 of the frame 79, somewhatin line with printing pad frame but on the side away from thepaper-supply roll, is the paper feeding roll mechanism. Sheets V, VIII,X.- A frame 132 is made with the two triangular sides 133 and theconnecting back 134. "In the back 101 of the frame 79 there is made anorifice 135. In this orifice there is keyed the enlargedend 136 of a,stud 137 which projects inwardly from the back 101. Besides the enlargedend 136 secured to the back 101 this stud 137 has just inside the end136 a smaller reduced portion 138 which 1s made as aneccentric and theelongated main portion 139, from the extreme end 140 spring 138 and 141being the same. The frame 132 and the other jaw 133 has a hole 143fitting the other eccentric 141. Loosely fitting the elongated mainportion 139 of the stud 137 is aroller 144having a soft rubber covering145 and at its end 146 a gear wheel 147 keyed thereon. Alined with theroller 144 is another roller 148 having a gear wheel 149 meshing withthe wheel 147. This roller 148 is loosely sleeved upon a stud 150 whichis secured at its outer end 151 in one of the triangular sides or jaws133 passes through the roller 148 and its other end 152 bears loosely inthe other jaw or side 133. In the connecting back 134 of the frame 132is an elongated recess, 153 arranged transverse of the frame 132.Passing through the back 134 of the frame 132 is a bolt 154. This bolthas a reduced end 155 adapted to a recess 156 in the back 101 of theframe 79. Next to this reduced end 155 the bolt 154 has'a collar 157adapted to fit snugly the elongated recess 153. Surrounding the mainportion 158 of the bolt 154 and between its collar 157 and a shoulder159 at the other end of the elongated recess 153 is a spiral 160. Thebolt 154 may have a knurled head 161. v

Secured to the face of the back 101 of the frame 79, above thepaper-feeding rolls and parallel with the paper-supply roll is the papertake-up mechanism. Sheet XII, Figs. XXXVI" and XXXVII. Projectinginwardly from the inner face of the back 101 of the frame 79 and firmlysecured there-' in is a stud 162. Loosely turning on the stud 162 is areel 163 having the barrel 164 through which the stud 162 passes andintegral with such barrel 164 the circular flange or wheel 165 havingthe teeth 166 on its edge. Adapted to engage the periphery of the barrel164 of the reel 163 is a spring clamp 167 made barrel shape, andconsisting of a number of elastic prongs 168 and a head i 169 having aknurled handle 170. Loosely pivoted upon the stud 162 between the back.

176. Sheet IX. The spring pawl 173 is provided with a pin 177 whichextends backward through the notch 176 and projects beyond the outerface of the back 101 of the frame 79 where it projects through a slot.178.in the upper end 179 of a downwardly projecting link 180, the lowerend 181 of which is pivotally connected to the lever 131', which, at itsinner end, is keyed upon the end 130 of the shaft 113, as has beenalready stated. From the outer end 175 of the pawl lever 172 thereextends upwardly a spring 182, the upper end 183 of which is secured toa stud 184 projecting from the frame 79. The lever 131 projectsoutwardly beyond the lower end 181 of the link 180 and has its outer end185 loosely connected to the upper end 186 of a downwardly projectinglink 187, the lower end 188 of which is secured loosely to the outer end189 of another lever 190 keyed at its end 191 to the outer projectingend 192 of a shaft 193, shown in detail on Sheet X, Fig. XXVII, theprincipal function of which is to be hereinafter described. To theprotruding end 185 of the link 131 there is pivotally connected theupper end 194 of a downwardly extending link 195 connected at its lowerend to a bell crank lever 196, which is connected by a link 197 with theshaft G. The details of the levers above described are to be found onSheets IX and VII.

The shaft 193 already referred to passes through an elongated bearing198 secured in the back 101 of the frame 79 (Sheet X) and projectingfrom the inner face of such back, carries the ink ribbon feed roller199. This roller 199 has at its end 200 a gear wheel 201 which isarranged to intermesh with the gear wheel 147 of the roller 144 of thepaper-feeding mechanism. At its other end 202 the roller 199 is madewith a circular head 203 forming the rabbet or shoulder 204 which actsas a'guide for the inking ribbon and having in its outer face thecircular recess 205 in which freely fits the circular head 206 of theshaft 193. In the edge of this head 206 there is made an angular notchin which is placed a ball 208 bearing on one side on the inner side ofthe notch 207 and on the other side against the inner face of the recess205. Over the head 206 there is fastened a plate 209 by a screw 210closing the recess 205 and retaining the ball 208 therein.

Located at the top corners of the frame 79 are two ink ribbon guiderollers 211, and there is a third one located near the bottom of theframe and substantially in line with the ink ribbon feed roller 199.These consist of hard rubber rollers 212 having flanged ends 213 securedto or turning loosely on the studs 214, held tightly'by their ends 215in the back 101 of the frame 79. The details of one of these studs isillustrated in Sheet XII, Fig. XL.

In the middle of the top of the back 101 of the frame 79 is located theink ribbon tension device 216. Sheet XII, Figs. XXXVIII and XXXIX. Astud 217 is fastened by the end 218 to the back 101 of the frame 79 andprojects from the inner face of said back. Held loosely on the stud 217is a barrel 219 having made integral therewith an arm 220, to the outerend 221 of which is rigidly secured the end 222 of a stud 223. ()n thisstud 223 there is loosely secured a roller 224 having the flanges 225 atits end. This ink ribbon tension device is located so that the roller224 will be in the path of the ink ribbon and bear thereon.

USE.

Location of parts.

When all the various parts are assembled together in an operativemechanism or completed scale for use, the various details will be in thepositions indicated in the drawings, except that Sheet I shows theposition of all the various electrical apparatus before beginning theoperation, while Sheets II and III show the positions of the severalparts of the several circuits except that the commutators are left inthe same position as that in which they are shown in Fig. I so as toprevent confusion and because the location and operation of commutatorsare Well understood. Moreover, Sheet IV, Fig. VIII shows the positionsof the several parts of the relay cups when the solenoids aredevitalized, and the views in Figs. IX and X show the positions of theparts of the relay cups when the solenoids are vitalized.

Around the ribbon guide rollers 200 and the ink ribbon feed rollers 199is placed the usual ink ribbon, the same being properly located in thepath of the printing pad 124 and between the printing pad 124 and thecounter 77 in the ordinary ,way. And on top of the face of this inkribbon there is the ink ribbon tension device 216. On the paper supplyroll support 102 is placed the ordinary paper supply roll, being heldthereon by the washer 107 and the thumb screw 109.

The loose end of the paper is passed under the printing pad 124 abovethe. ink ribbon, then under the roller 128 secured to the printing padsupport 123, then passed under the roller 148 and then up and betweenthe roller 148 and the roller 144 of the paper feeding roll mechanism.To permit of the free passage of the paper between the,two

rolls 144 and 148, the bolt 154 is releasedfrom the recess 156 of theframe 79 and the paper feed roll mechanism is turned upon the eccentrics138 and 141 thereby separating the two rollers 148 and 144 for the freepassage of the paper. The loose end of the paper isthen passed aroundthe reel 163 of the paper take-up mechanism on which reel the end of thepaper is securely held by the spring clamp 167 which is sprung over theend of the paper holding it firmly on the reel 163.

' OPERATION.

It will be noted that prior to using the with the weighing apparatusthrough scale the circuits are all open, each being se arated at someparticular point.

\ ach operator is provided with a specially designed key so that, aswill be hereinafter indicated, the record of the scale shows justexactly which operator does the which, as has already been stated, it isnot necessary'to show, but which is connectpld t e beam rod 20.

The operative handle N is then turned in the position shown in dottedlines in Fig. I, turning the shaft G, the commutators H, K, and L andthe ratchet wheel N. When this is done, the pawl o" of the armature 12engages the teeth u of ratchet N, while the pair of brushes e and c bearupon the metallic stri h of the commutator H, and the pair of rushes fand f bear upon the metallic strip Z of the commutator L and themetallic strip is of the commutator K is moved out of contact with thepair of brushes w and-w cell a of the battery A through the wires F andF, brush 6', metallic strip h of the commutator H, brushc, wire E, tothe field D of the motor M, thence by wire C to the negative plate 0' ofthe cell a of the battery A.

The starting circuit, (Fig. III.)

At the sametime current flows from the same positive plate 0 of the cella of the battery A'through the wires F, F to the f wire f to the lowersolenoid r of the relay cup R, thence by wire 1" to the lower solenoid gof the relay' cup Q, thence by wire 7 to the bindin post 4 of the relaycup 5 (Figs. .III, I and thence by wire 9 to the negative .plate 0' ofthe cell a of the battery A. As the current thus flows through thestarting circuit, as indicated in Fig. III of the drawings, the twolower solenoids r and g are vitalized. This draws down the soft coresand 2 of the relay cups Q and R releasing the pressure against thespring contacts f and Q2, and the spring contacts coming down, break atthe bindin posts V and g -and form a contact throng i the binding posts1' and g Tizfe direct armature circuit, IV.) The closure between thespring contacts g and binding post 9* closes'the direct armature circuitas follows: The current passes from the positive plate 0 of the cell aof the battery A through the connecting wire B, the wires 0, 0' to thearmature M of the motor M. It passes thence by the wire p to the bindingpost p of the relay cup P (Fig. VIII), spring contact 20 w1re 7 uppersolenoid g of the relay cup Q, thence by wire 9 to the upper relay r ofthe relay cup R. Thence by wire 7" to the sprin contact 9 of the relaycup Q (Figs. Iii and X), through the contact point 9 to the binding post9", the vitalized solenoid g in the starting circuit holding down thesoft core 3 thus allowing the spring contact 9 to contact with the.contact 9 thence by wire Q5 to the negative plate 0 of the cell a of thebattery A. It may be noted in passing that while the field circuit hasthe power of the and switch 0 wire 0" full battery, that is both cells,the direct I armature circuit has only the power of onehalf of thebattery, that is one cell. That is to say, the field circuit has twicethe po- -tential of the direct armature circuit.

Cutting-out circuit, V.)

When the closure is made between the spring contact 9 and the contactpoint of the binding post Q4, thus closing the direct armature circuit,the cutting-out circuit is also closed. The current flows from thepositive plate 0, of the cell (IV of the' battery A through theconnecting wire. B,

Wires 0, T, solenoid a, wire T, brush 1,

metallic strip 8 of the commutator s on' the shaft 3', brush f, wire'1", to the wire 1" at the point t, wire 1''. spring contact bindingpost wire 1. to the negative plate 0' of the cell aof the battery A. Thecurrent of this cutting-out circuit vitalizing ,the solenoid 8 causes,through the pinion strip 8 of the commutator s is brought into contactwith the pair of brushes 4) and '0 making a closure at that point. Thebreak-- age of the starting circuit causes a devitalization of the lowersolenoids g and 1' of the relay cups Q, andR. But the upper

